unit 4 astronomy: the science of the stars
part 1 teaching design
第一部分 教学设计
period 1 a sample lesson plan for reading
(how life began on the earth)
introduction
in this period, after the warming up, students will first be guided to talk and share. then they will be helped to read an exposition(说明文)entitled how life began on the earth. then the students may be asked to listen and read aloud,read and underline,read and understand difficult sentences,read and transfer information,read and translate, read to decide on the type of writing and summary of the text and finally read to draw a tree diagram of the text and retell the story with the help of the diagram. the period will end in students having a discussion—how did the uni verse begin?
objectives
to help students understand the text’s forms and contents and learn about festival astronomy
to help students communicate on the topic in focus with the words, expression s and structures learned in this unit
focus
words dissolve, exist,puzzle,crash,pull,float,exhaust
expressions in time, lay eggs, give birth to, block out, cheer up, now that, break out, watch out
patterns 1. it exploded loudly with fire and rock, which were in time to produce the water vapor, carbon dioxide, oxygen, nitrogen and other gases, which were to make the earth’s atmosphere.
2. nobody knew that it was going to be different from other planets going round the sun.
3. it allowed the earth to dissolve harmful gases, which had become part of the earth’s atmosphere, into the oceans and seas.
4. this encouraged the development of early shellfish and all sorts of fish.
5. they produced young generally by laying eggs.
6. they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.
7. whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.
aids
multimedia faciliti es, tape-recorder, photos, diagrams
procedures
i. warming up by learning vocabulary
good morning, class! today, we are going to take unit 4 astronomy: the science of the stars. before we read the text, let’s turn to page 99 and get familiarized with the vocabulary first. pay attention to the making of the word. study the prefixes, roots and suffixes in the words.
ii. pre-reading
1. looking and saying
have you ever wondere d how the universe began? well i'm sure you may have many answers to this question, but i have one that perhaps, you may not have heard of yet. i will be giving you my theory on this subject. now look at the screen and listen to me telling you something exciting.
how life began on the earth
what was the earth like after the “big bang”? a cloud of energetic dust at first and then a ball around the sun. in time as a result of its explosion, water vapor and many other gases were produced to make the earth’s atmosphere. water then appeared when it cooled down, offering the possibility for the beginning of life.
why was the earth different? the arrival of small plants growing in the water filled the oceans and seas with oxygen, encouraging the development of small living things.
how was life developed on earth? carbon dioxide and air with oxygen helped life developed. first were insects and amphibians, and then appeared reptiles and dinosaurs, producing young by laying eggs. at first, came mammals producing young from within their bodies.
what did small clever animals do? with hands and feet, they spread all over the earth, developing new methods of growing food, hunting and moving around, yet neglecting the environment protection, causing new problems for human being’s existence for good.
5. reading the text once again to decide on the type of writing and summary of the text
type of writing this is a descriptive writing.
main idea of the passage
the earth came i nto being after the “big bang”. then small plants came growing in the water, followed by green plants appearing on land. in the end a ppeared small clever animals.
topic sentence of 1st paragraph after the “big bang”, the earth was just a cloud of energetic dust.
topic sentence of 2nd paragraph the earth was different because of the arrival of small plants growing in the water.
topic sentence of 3rd paragraph many millions of years later the first green plants began to appear on land.
topic sentence of 4th paragraph small clever animals appeared and spread all over the earth.
6. going over the text to make a tree diagram and retell the story with its help
7. reading and translating
as y ou have read the text times, you can surely put it into chinese. wang hongqin, will you be the first to have a try, of putting the first paragraph into chinese.